/*-------------------------------------------------------------------------
 *
 * postgres.h--
 *    definition of (and support for) postgres system types.
 * this file is included by almost every .c in the system
 *
 * Copyright (c) 1995, Regents of the University of California
 *
 * $Id: postgres.h,v 1.3 1996/12/10 07:03:40 bryanh Exp $
 *
 *-------------------------------------------------------------------------
 */
/*
 *   NOTES
 *	this file will eventually contain the definitions for the
 *	following (and perhaps other) system types:
 *
 *		int2       int4       float4       float8
 *              Oid        regproc    RegProcedure
 *              aclitem
 *              struct varlena
 *              char8      char16      int28      oid8
 *              bytea      text
 *		NameData   Name	  
 *              oidint4    oidint2    oidname
 *
 *   TABLE OF CONTENTS
 *	1)	simple type definitions
 *	2)	varlena and array types
 *	3)	TransactionId and CommandId
 *	4)	genbki macros used by catalog/pg_xxx.h files
 *	5)	random SIGNBIT, MAXPGPATH, STATUS macros
 *
 * ----------------------------------------------------------------
 */
#ifndef POSTGRES_H
#define POSTGRES_H

#include "postgres_ext.h"
#include "config.h"
#include "c.h"
#include "utils/elog.h"
#include "utils/palloc.h"

/* ----------------------------------------------------------------
 *		Section 1:  simple type definitions
 * ----------------------------------------------------------------
 */

typedef	int16	int2;
typedef int32	int4;
typedef float	float4;
typedef double	float8;

typedef int4 aclitem;

#define InvalidOid	0
#define OidIsValid(objectId)  ((bool) (objectId != InvalidOid))

/* unfortunately, both regproc and RegProcedure are used */
typedef Oid regproc; 
typedef Oid RegProcedure;

/* ptr to func returning (char *) */
typedef char *	((*func_ptr)());	


#define RegProcedureIsValid(p)  OidIsValid(p)

/* ----------------------------------------------------------------
 *		Section 2:  variable length and array types
 * ----------------------------------------------------------------
 */
/* ----------------
 *	struct varlena
 * ----------------
 */
struct varlena {
	int32	vl_len;
	char	vl_dat[1];
};

#define	VARSIZE(PTR)	(((struct varlena *)(PTR))->vl_len)
#define	VARDATA(PTR)    (((struct varlena *)(PTR))->vl_dat)
#define	VARHDRSZ	sizeof(int32)

typedef struct varlena bytea;
typedef struct varlena text;

typedef struct char8 {
	char	data[8];
} char8;

/* ----------------
 *	char16
 * ----------------
 */
typedef struct char16 {
	char	data[16];
} char16;

typedef char16	*Char16;

typedef int2 int28[8];
typedef Oid oid8[8];

typedef struct nameData {
    char data[NAMEDATALEN];
} NameData;
typedef NameData	*Name;

/* ----------------
 *	oidint4
 *
 *	this is a new system type used by the file interface.
 * ----------------
 */
typedef struct OidInt4Data {
	Oid	oi_oid;
	int32		oi_int4;
} OidInt4Data;

typedef struct OidInt4Data	*OidInt4;

/* ----------------
 *	oidint2
 *
 *	this is a new system type used to define indices on two attrs.
 * ----------------
 */
typedef struct OidInt2Data {
	Oid	oi_oid;
	int16		oi_int2;
} OidInt2Data;

typedef struct OidInt2Data	*OidInt2;

/* ----------------
 *	oidname
 *
 *	this is a new system type used to define indices on two attrs.
 * ----------------
 */
typedef struct OidNameData {
	Oid	id;
	NameData name;
} OidNameData;

typedef struct OidNameData	*OidName;

/* ----------------------------------------------------------------
 *		Section 3: TransactionId and CommandId
 * ----------------------------------------------------------------
 */

typedef uint32			TransactionId;
#define InvalidTransactionId	0
typedef uint16			CommandId;
#define FirstCommandId	0

/* ----------------------------------------------------------------
 *		Section 4: genbki macros used by the
 *			   catalog/pg_xxx.h files
 * ----------------------------------------------------------------
 */
#define CATALOG(x) \
    typedef struct CppConcat(FormData_,x)

#define DATA(x) extern int errno
#define DECLARE_INDEX(x) extern int errno

#define BUILD_INDICES
#define BOOTSTRAP

#define BKI_BEGIN
#define BKI_END

/* ----------------------------------------------------------------
 *		Section 5:  random stuff
 *			    SIGNBIT, MAXPGPATH, STATUS...
 * ----------------------------------------------------------------
 */

/* msb for int/unsigned */
#define	SIGNBIT	(0x8000)

/* msb for char */
#define	CSIGNBIT (1 << 7)

/* ----------------
 *	global variables which should probably go someplace else.
 * ----------------
 */
#define	MAXPGPATH	128

#define STATUS_OK               (0)
#define STATUS_ERROR            (-1)
#define STATUS_NOT_FOUND        (-2)
#define STATUS_INVALID          (-3)
#define STATUS_UNCATALOGUED     (-4)
#define STATUS_REPLACED         (-5)
#define STATUS_NOT_DONE		(-6)
#define STATUS_BAD_PACKET	(-7)
#define STATUS_FOUND            (1)

#endif /* POSTGRES_H */
